diff --git a/mayan/apps/acls/api_views.py b/mayan/apps/acls/api_views.py
index 13c07b7299..5c3612a9cb 100644
--- a/mayan/apps/acls/api_views.py
+++ b/mayan/apps/acls/api_views.py
@@ -21,12 +21,12 @@ class APIObjectACLListView(generics.ListCreateAPIView):
     """
     def get_content_object(self):
         content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
         content_object = get_object_or_404(
-            content_type.model_class(), pk=self.kwargs['object_pk']
+            klass=content_type.model_class(), pk=self.kwargs['object_pk']
         )
 
         if self.request.method == 'GET':
@@ -85,12 +85,12 @@ class APIObjectACLView(generics.RetrieveDestroyAPIView):
             permission_required = permission_acl_edit
 
         content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
         content_object = get_object_or_404(
-            content_type.model_class(), pk=self.kwargs['object_pk']
+            klass=content_type.model_class(), pk=self.kwargs['object_pk']
         )
 
         AccessControlList.objects.check_access(
@@ -111,17 +111,17 @@ class APIObjectACLPermissionListView(generics.ListCreateAPIView):
     """
     def get_acl(self):
         return get_object_or_404(
-            self.get_content_object().acls, pk=self.kwargs['pk']
+            klass=self.get_content_object().acls, pk=self.kwargs['pk']
         )
 
     def get_content_object(self):
         content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
         content_object = get_object_or_404(
-            content_type.model_class(), pk=self.kwargs['object_pk']
+            klass=content_type.model_class(), pk=self.kwargs['object_pk']
         )
 
         AccessControlList.objects.check_access(
@@ -168,17 +168,17 @@ class APIObjectACLPermissionView(generics.RetrieveDestroyAPIView):
 
     def get_acl(self):
         return get_object_or_404(
-            self.get_content_object().acls, pk=self.kwargs['pk']
+            klass=self.get_content_object().acls, pk=self.kwargs['pk']
         )
 
     def get_content_object(self):
         content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
         content_object = get_object_or_404(
-            content_type.model_class(), pk=self.kwargs['object_pk']
+            klass=content_type.model_class(), pk=self.kwargs['object_pk']
         )
 
         AccessControlList.objects.check_access(
diff --git a/mayan/apps/acls/views.py b/mayan/apps/acls/views.py
index 79d1b496fb..241217eb24 100644
--- a/mayan/apps/acls/views.py
+++ b/mayan/apps/acls/views.py
@@ -33,7 +33,7 @@ class ACLCreateView(SingleObjectCreateView):
 
     def dispatch(self, request, *args, **kwargs):
         self.object_content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
@@ -89,7 +89,7 @@ class ACLDeleteView(SingleObjectDeleteView):
     model = AccessControlList
 
     def dispatch(self, request, *args, **kwargs):
-        acl = get_object_or_404(AccessControlList, pk=self.kwargs['pk'])
+        acl = get_object_or_404(klass=AccessControlList, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_acl_edit, user=request.user,
@@ -117,7 +117,7 @@ class ACLDeleteView(SingleObjectDeleteView):
 class ACLListView(SingleObjectListView):
     def dispatch(self, request, *args, **kwargs):
         self.object_content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
@@ -189,11 +189,11 @@ class ACLPermissionsView(AssignRemoveView):
         return results
 
     def add(self, item):
-        permission = get_object_or_404(StoredPermission, pk=item)
+        permission = get_object_or_404(klass=StoredPermission, pk=item)
         self.get_object().permissions.add(permission)
 
     def dispatch(self, request, *args, **kwargs):
-        acl = get_object_or_404(AccessControlList, pk=self.kwargs['pk'])
+        acl = get_object_or_404(klass=AccessControlList, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_acl_edit, user=request.user,
@@ -242,7 +242,7 @@ class ACLPermissionsView(AssignRemoveView):
         return StoredPermission.objects.filter(pk__in=merged_pks)
 
     def get_object(self):
-        return get_object_or_404(AccessControlList, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=AccessControlList, pk=self.kwargs['pk'])
 
     def get_right_list_help_text(self):
         if self.get_object().get_inherited_permissions():
@@ -257,7 +257,7 @@ class ACLPermissionsView(AssignRemoveView):
         return ACLPermissionsView.generate_choices(self.get_available_list())
 
     def remove(self, item):
-        permission = get_object_or_404(StoredPermission, pk=item)
+        permission = get_object_or_404(klass=StoredPermission, pk=item)
         self.get_object().permissions.remove(permission)
 
     def right_list(self):
diff --git a/mayan/apps/cabinets/api_views.py b/mayan/apps/cabinets/api_views.py
index 99f8ceb45b..65ac40d791 100644
--- a/mayan/apps/cabinets/api_views.py
+++ b/mayan/apps/cabinets/api_views.py
@@ -33,7 +33,7 @@ class APIDocumentCabinetListView(generics.ListAPIView):
     mayan_object_permissions = {'GET': (permission_cabinet_view,)}
 
     def get_queryset(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=self.request.user,
             obj=document
@@ -135,7 +135,7 @@ class APICabinetDocumentListView(generics.ListCreateAPIView):
         return context
 
     def get_cabinet(self):
-        return get_object_or_404(Cabinet, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Cabinet, pk=self.kwargs['pk'])
 
     def get_queryset(self):
         cabinet = self.get_cabinet()
@@ -163,7 +163,7 @@ class APICabinetDocumentView(generics.RetrieveDestroyAPIView):
     serializer_class = CabinetDocumentSerializer
 
     def get_cabinet(self):
-        return get_object_or_404(Cabinet, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Cabinet, pk=self.kwargs['pk'])
 
     def get_queryset(self):
         return self.get_cabinet().documents.all()
diff --git a/mayan/apps/cabinets/views.py b/mayan/apps/cabinets/views.py
index 53f44ca1cc..8e142a7aa5 100644
--- a/mayan/apps/cabinets/views.py
+++ b/mayan/apps/cabinets/views.py
@@ -133,7 +133,7 @@ class CabinetDetailView(DocumentListView):
         return context
 
     def get_object(self):
-        cabinet = get_object_or_404(Cabinet, pk=self.kwargs['pk'])
+        cabinet = get_object_or_404(klass=Cabinet, pk=self.kwargs['pk'])
 
         if cabinet.is_root_node():
             permission_object = cabinet
@@ -188,7 +188,7 @@ class CabinetListView(SingleObjectListView):
 
 class DocumentCabinetListView(CabinetListView):
     def dispatch(self, request, *args, **kwargs):
-        self.document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        self.document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=request.user,
diff --git a/mayan/apps/checkouts/views.py b/mayan/apps/checkouts/views.py
index 8a4c751d64..c58f42444b 100644
--- a/mayan/apps/checkouts/views.py
+++ b/mayan/apps/checkouts/views.py
@@ -28,7 +28,7 @@ class CheckoutDocumentView(SingleObjectCreateView):
     form_class = DocumentCheckoutForm
 
     def dispatch(self, request, *args, **kwargs):
-        self.document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        self.document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_check_out, user=request.user,
@@ -124,7 +124,7 @@ class CheckoutDetailView(SingleObjectDetailView):
         }
 
     def get_object(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
 
 class DocumentCheckinView(ConfirmView):
@@ -146,7 +146,7 @@ class DocumentCheckinView(ConfirmView):
         return context
 
     def get_object(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_post_action_redirect(self):
         return reverse('checkouts:check_out_info', args=(self.get_object().pk,))
diff --git a/mayan/apps/converter/views.py b/mayan/apps/converter/views.py
index d1ec08c0a7..1ba13ecd9a 100644
--- a/mayan/apps/converter/views.py
+++ b/mayan/apps/converter/views.py
@@ -32,7 +32,7 @@ class TransformationDeleteView(SingleObjectDeleteView):
 
     def dispatch(self, request, *args, **kwargs):
         self.transformation = get_object_or_404(
-            Transformation, pk=self.kwargs['pk']
+            klass=Transformation, pk=self.kwargs['pk']
         )
 
         AccessControlList.objects.check_access(
@@ -80,7 +80,7 @@ class TransformationCreateView(SingleObjectCreateView):
 
     def dispatch(self, request, *args, **kwargs):
         content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
@@ -139,7 +139,7 @@ class TransformationEditView(SingleObjectEditView):
 
     def dispatch(self, request, *args, **kwargs):
         self.transformation = get_object_or_404(
-            Transformation, pk=self.kwargs['pk']
+            klass=Transformation, pk=self.kwargs['pk']
         )
 
         AccessControlList.objects.check_access(
@@ -188,7 +188,7 @@ class TransformationEditView(SingleObjectEditView):
 class TransformationListView(SingleObjectListView):
     def dispatch(self, request, *args, **kwargs):
         content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
diff --git a/mayan/apps/document_comments/api_views.py b/mayan/apps/document_comments/api_views.py
index af7bec614f..04ea5b0897 100644
--- a/mayan/apps/document_comments/api_views.py
+++ b/mayan/apps/document_comments/api_views.py
@@ -25,7 +25,9 @@ class APICommentListView(generics.ListCreateAPIView):
         else:
             permission_required = permission_comment_create
 
-        document = get_object_or_404(Document, pk=self.kwargs['document_pk'])
+        document = get_object_or_404(
+            klass=Document, pk=self.kwargs['document_pk']
+        )
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -78,7 +80,9 @@ class APICommentView(generics.RetrieveDestroyAPIView):
         else:
             permission_required = permission_comment_delete
 
-        document = get_object_or_404(Document, pk=self.kwargs['document_pk'])
+        document = get_object_or_404(
+            klass=Document, pk=self.kwargs['document_pk']
+        )
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
diff --git a/mayan/apps/document_comments/views.py b/mayan/apps/document_comments/views.py
index 018bdfe0f6..ec69239f3d 100644
--- a/mayan/apps/document_comments/views.py
+++ b/mayan/apps/document_comments/views.py
@@ -35,7 +35,7 @@ class DocumentCommentCreateView(SingleObjectCreateView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -90,7 +90,7 @@ class DocumentCommentDeleteView(SingleObjectDeleteView):
 
 class DocumentCommentListView(SingleObjectListView):
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
diff --git a/mayan/apps/document_indexing/api_views.py b/mayan/apps/document_indexing/api_views.py
index cf0b41487a..095a1bdd23 100644
--- a/mayan/apps/document_indexing/api_views.py
+++ b/mayan/apps/document_indexing/api_views.py
@@ -63,7 +63,7 @@ class APIIndexNodeInstanceDocumentListView(generics.ListAPIView):
 
     def get_queryset(self):
         index_node_instance = get_object_or_404(
-            IndexInstanceNode, pk=self.kwargs['pk']
+            klass=IndexInstanceNode, pk=self.kwargs['pk']
         )
         AccessControlList.objects.check_access(
             permissions=permission_document_indexing_view,
@@ -110,7 +110,7 @@ class APIDocumentIndexListView(generics.ListAPIView):
     serializer_class = IndexInstanceNodeSerializer
 
     def get_queryset(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=self.request.user,
             obj=document
diff --git a/mayan/apps/document_indexing/views.py b/mayan/apps/document_indexing/views.py
index 50e9c8fdeb..6a015ce7bf 100644
--- a/mayan/apps/document_indexing/views.py
+++ b/mayan/apps/document_indexing/views.py
@@ -118,7 +118,7 @@ class SetupIndexDocumentTypesView(AssignRemoveView):
         }
 
     def get_object(self):
-        return get_object_or_404(Index, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Index, pk=self.kwargs['pk'])
 
     def left_list(self):
         return AssignRemoveView.generate_choices(
@@ -148,7 +148,7 @@ class SetupIndexTreeTemplateListView(SingleObjectListView):
         }
 
     def get_index(self):
-        return get_object_or_404(Index, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Index, pk=self.kwargs['pk'])
 
     def get_object_list(self):
         return self.get_index().template_root.get_descendants(
@@ -184,7 +184,7 @@ class TemplateNodeCreateView(SingleObjectCreateView):
         }
 
     def get_parent_node(self):
-        return get_object_or_404(IndexTemplateNode, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=IndexTemplateNode, pk=self.kwargs['pk'])
 
 
 class TemplateNodeDeleteView(SingleObjectDeleteView):
@@ -259,7 +259,7 @@ class IndexInstanceNodeView(DocumentListView):
 
     def dispatch(self, request, *args, **kwargs):
         self.index_instance_node = get_object_or_404(
-            IndexInstanceNode, pk=self.kwargs['pk']
+            klass=IndexInstanceNode, pk=self.kwargs['pk']
         )
 
         AccessControlList.objects.check_access(
@@ -339,7 +339,7 @@ class DocumentIndexNodeListView(SingleObjectListView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
diff --git a/mayan/apps/document_parsing/api_views.py b/mayan/apps/document_parsing/api_views.py
index 212ace6b09..7d29b61d94 100644
--- a/mayan/apps/document_parsing/api_views.py
+++ b/mayan/apps/document_parsing/api_views.py
@@ -25,11 +25,12 @@ class APIDocumentPageContentView(generics.RetrieveAPIView):
     serializer_class = DocumentPageContentSerializer
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['document_pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['document_pk'])
 
     def get_document_version(self):
         return get_object_or_404(
-            self.get_document().versions.all(), pk=self.kwargs['version_pk']
+            klass=self.get_document().versions.all(),
+            pk=self.kwargs['version_pk']
         )
 
     def get_queryset(self):
diff --git a/mayan/apps/document_parsing/views.py b/mayan/apps/document_parsing/views.py
index 9ed149e018..10636ab59b 100644
--- a/mayan/apps/document_parsing/views.py
+++ b/mayan/apps/document_parsing/views.py
@@ -83,7 +83,7 @@ class DocumentParsingErrorsListView(SingleObjectListView):
     view_permission = permission_content_view
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -143,7 +143,7 @@ class DocumentTypeSettingsEditView(SingleObjectEditView):
     post_action_redirect = reverse_lazy('documents:document_type_list')
 
     def get_document_type(self):
-        return get_object_or_404(DocumentType, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentType, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
diff --git a/mayan/apps/document_signatures/views.py b/mayan/apps/document_signatures/views.py
index 5f837902d6..4c0aa5d6fb 100644
--- a/mayan/apps/document_signatures/views.py
+++ b/mayan/apps/document_signatures/views.py
@@ -114,7 +114,7 @@ class DocumentVersionDetachedSignatureCreateView(FormView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document_version(self):
-        return get_object_or_404(DocumentVersion, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentVersion, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -213,7 +213,7 @@ class DocumentVersionEmbeddedSignatureCreateView(FormView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document_version(self):
-        return get_object_or_404(DocumentVersion, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentVersion, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -296,7 +296,7 @@ class DocumentVersionSignatureListView(SingleObjectListView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document_version(self):
-        return get_object_or_404(DocumentVersion, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentVersion, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -351,7 +351,7 @@ class DocumentVersionSignatureUploadView(SingleObjectCreateView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document_version(self):
-        return get_object_or_404(DocumentVersion, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentVersion, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
diff --git a/mayan/apps/document_states/api_views.py b/mayan/apps/document_states/api_views.py
index dd3ada2d3f..0ba286e06b 100644
--- a/mayan/apps/document_states/api_views.py
+++ b/mayan/apps/document_states/api_views.py
@@ -35,7 +35,9 @@ class APIDocumentTypeWorkflowListView(generics.ListAPIView):
     serializer_class = WorkflowSerializer
 
     def get_document_type(self):
-        document_type = get_object_or_404(DocumentType, pk=self.kwargs['pk'])
+        document_type = get_object_or_404(
+            klass=DocumentType, pk=self.kwargs['pk']
+        )
 
         AccessControlList.objects.check_access(
             permissions=permission_document_type_view, user=self.request.user,
@@ -100,7 +102,7 @@ class APIWorkflowDocumentTypeList(generics.ListCreateAPIView):
         else:
             permission_required = permission_workflow_edit
 
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -153,7 +155,7 @@ class APIWorkflowDocumentTypeView(generics.RetrieveDestroyAPIView):
         else:
             permission_required = permission_workflow_edit
 
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -256,7 +258,7 @@ class APIWorkflowStateListView(generics.ListCreateAPIView):
         else:
             permission_required = permission_workflow_edit
 
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -299,7 +301,7 @@ class APIWorkflowStateView(generics.RetrieveUpdateDestroyAPIView):
         else:
             permission_required = permission_workflow_edit
 
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -352,7 +354,7 @@ class APIWorkflowTransitionListView(generics.ListCreateAPIView):
         else:
             permission_required = permission_workflow_edit
 
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -406,7 +408,7 @@ class APIWorkflowTransitionView(generics.RetrieveUpdateDestroyAPIView):
         else:
             permission_required = permission_workflow_edit
 
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -430,7 +432,7 @@ class APIWorkflowInstanceListView(generics.ListAPIView):
     }
 
     def get_document(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_workflow_view, user=self.request.user,
@@ -455,7 +457,7 @@ class APIWorkflowInstanceView(generics.RetrieveAPIView):
     serializer_class = WorkflowInstanceSerializer
 
     def get_document(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_workflow_view, user=self.request.user,
@@ -474,7 +476,7 @@ class APIWorkflowInstanceLogEntryListView(generics.ListCreateAPIView):
     post: Transition a document workflow by creating a new document workflow log entry.
     """
     def get_document(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         if self.request.method == 'GET':
             """
@@ -521,7 +523,7 @@ class APIWorkflowInstanceLogEntryListView(generics.ListCreateAPIView):
 
     def get_workflow_instance(self):
         workflow = get_object_or_404(
-            self.get_document().workflows, pk=self.kwargs['workflow_pk']
+            klass=self.get_document().workflows, pk=self.kwargs['workflow_pk']
         )
 
         return workflow
diff --git a/mayan/apps/document_states/views/workflow_instance_views.py b/mayan/apps/document_states/views/workflow_instance_views.py
index 33eab52c4d..034e8786ab 100644
--- a/mayan/apps/document_states/views/workflow_instance_views.py
+++ b/mayan/apps/document_states/views/workflow_instance_views.py
@@ -32,7 +32,7 @@ class DocumentWorkflowInstanceListView(SingleObjectListView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -81,7 +81,7 @@ class WorkflowInstanceDetailView(SingleObjectListView):
         return self.get_workflow_instance().log_entries.order_by('-datetime')
 
     def get_workflow_instance(self):
-        return get_object_or_404(WorkflowInstance, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=WorkflowInstance, pk=self.kwargs['pk'])
 
 
 class WorkflowInstanceTransitionView(FormView):
@@ -121,4 +121,4 @@ class WorkflowInstanceTransitionView(FormView):
         return self.get_workflow_instance().get_absolute_url()
 
     def get_workflow_instance(self):
-        return get_object_or_404(WorkflowInstance, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=WorkflowInstance, pk=self.kwargs['pk'])
diff --git a/mayan/apps/document_states/views/workflow_proxy_views.py b/mayan/apps/document_states/views/workflow_proxy_views.py
index d3208ce0ee..85e45f0ec0 100644
--- a/mayan/apps/document_states/views/workflow_proxy_views.py
+++ b/mayan/apps/document_states/views/workflow_proxy_views.py
@@ -23,7 +23,7 @@ __all__ = (
 class WorkflowDocumentListView(DocumentListView):
     def dispatch(self, request, *args, **kwargs):
         self.workflow = get_object_or_404(
-            WorkflowRuntimeProxy, pk=self.kwargs['pk']
+            klass=WorkflowRuntimeProxy, pk=self.kwargs['pk']
         )
 
         AccessControlList.objects.check_access(
@@ -109,7 +109,7 @@ class WorkflowStateDocumentListView(DocumentListView):
 
     def get_workflow_state(self):
         workflow_state = get_object_or_404(
-            WorkflowStateRuntimeProxy, pk=self.kwargs['pk']
+            klass=WorkflowStateRuntimeProxy, pk=self.kwargs['pk']
         )
 
         AccessControlList.objects.check_access(
@@ -156,4 +156,6 @@ class WorkflowStateListView(SingleObjectListView):
         )
 
     def get_workflow(self):
-        return get_object_or_404(WorkflowRuntimeProxy, pk=self.kwargs['pk'])
+        return get_object_or_404(
+            klass=WorkflowRuntimeProxy, pk=self.kwargs['pk']
+        )
diff --git a/mayan/apps/document_states/views/workflow_views.py b/mayan/apps/document_states/views/workflow_views.py
index 2da8abbd5e..3582532bcc 100644
--- a/mayan/apps/document_states/views/workflow_views.py
+++ b/mayan/apps/document_states/views/workflow_views.py
@@ -128,7 +128,7 @@ class SetupWorkflowDocumentTypesView(AssignRemoveView):
         }
 
     def get_object(self):
-        return get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
     def left_list(self):
         return AssignRemoveView.generate_choices(
@@ -189,7 +189,7 @@ class SetupWorkflowStateActionCreateView(SingleObjectDynamicFormCreateView):
         }
 
     def get_object(self):
-        return get_object_or_404(WorkflowState, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=WorkflowState, pk=self.kwargs['pk'])
 
     def get_post_action_redirect(self):
         return reverse(
@@ -290,7 +290,7 @@ class SetupWorkflowStateActionListView(SingleObjectListView):
         return self.get_workflow_state().actions.all()
 
     def get_workflow_state(self):
-        return get_object_or_404(WorkflowState, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=WorkflowState, pk=self.kwargs['pk'])
 
 
 class SetupWorkflowStateActionSelectionView(FormView):
@@ -317,7 +317,7 @@ class SetupWorkflowStateActionSelectionView(FormView):
         }
 
     def get_object(self):
-        return get_object_or_404(WorkflowState, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=WorkflowState, pk=self.kwargs['pk'])
 
 
 # Workflow states
@@ -343,7 +343,7 @@ class SetupWorkflowStateCreateView(SingleObjectCreateView):
         )
 
     def get_workflow(self):
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
         AccessControlList.objects.check_access(
             permissions=(permission_workflow_edit,), obj=workflow,
             user=self.request.user
@@ -378,7 +378,7 @@ class SetupWorkflowStateDeleteView(SingleObjectDeleteView):
         )
 
     def get_workflow(self):
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
         AccessControlList.objects.check_access(
             permissions=(permission_workflow_edit,), obj=workflow,
             user=self.request.user
@@ -441,7 +441,7 @@ class SetupWorkflowStateListView(SingleObjectListView):
         return self.get_workflow().states.all()
 
     def get_workflow(self):
-        return get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
 
 # Transitions
@@ -490,7 +490,7 @@ class SetupWorkflowTransitionCreateView(SingleObjectCreateView):
         )
 
     def get_workflow(self):
-        workflow = get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        workflow = get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
         AccessControlList.objects.check_access(
             permissions=(permission_workflow_edit,), obj=workflow,
             user=self.request.user
@@ -571,7 +571,7 @@ class SetupWorkflowTransitionListView(SingleObjectListView):
         return self.get_workflow().transitions.all()
 
     def get_workflow(self):
-        return get_object_or_404(Workflow, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Workflow, pk=self.kwargs['pk'])
 
 
 class SetupWorkflowTransitionTriggerEventListView(FormView):
@@ -612,7 +612,7 @@ class SetupWorkflowTransitionTriggerEventListView(FormView):
         ).form_valid(form=form)
 
     def get_object(self):
-        return get_object_or_404(WorkflowTransition, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=WorkflowTransition, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
diff --git a/mayan/apps/documents/views/document_page_views.py b/mayan/apps/documents/views/document_page_views.py
index b1f02793e8..ebc2417e9e 100644
--- a/mayan/apps/documents/views/document_page_views.py
+++ b/mayan/apps/documents/views/document_page_views.py
@@ -39,7 +39,7 @@ class DocumentPageListView(SingleObjectListView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -67,7 +67,7 @@ class DocumentPageNavigationBase(RedirectView):
         )
 
     def get_object(self):
-        return get_object_or_404(DocumentPage, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentPage, pk=self.kwargs['pk'])
 
     def get_redirect_url(self, *args, **kwargs):
         parse_result = urlparse(
@@ -197,7 +197,7 @@ class DocumentPageView(SimpleView):
         }
 
     def get_object(self):
-        return get_object_or_404(DocumentPage, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentPage, pk=self.kwargs['pk'])
 
 
 class DocumentPageViewResetView(RedirectView):
@@ -218,7 +218,7 @@ class DocumentPageInteractiveTransformation(RedirectView):
         )
 
     def get_object(self):
-        return get_object_or_404(DocumentPage, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentPage, pk=self.kwargs['pk'])
 
     def get_redirect_url(self, *args, **kwargs):
         url = reverse(
diff --git a/mayan/apps/documents/views/document_type_views.py b/mayan/apps/documents/views/document_type_views.py
index a2b05bc64f..034412f2e6 100644
--- a/mayan/apps/documents/views/document_type_views.py
+++ b/mayan/apps/documents/views/document_type_views.py
@@ -33,7 +33,7 @@ logger = logging.getLogger(__name__)
 
 class DocumentTypeDocumentListView(DocumentListView):
     def get_document_type(self):
-        return get_object_or_404(DocumentType, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentType, pk=self.kwargs['pk'])
 
     def get_document_queryset(self):
         return self.get_document_type().documents.all()
@@ -140,7 +140,7 @@ class DocumentTypeFilenameCreateView(SingleObjectCreateView):
         )
 
     def get_document_type(self):
-        return get_object_or_404(DocumentType, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentType, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -213,7 +213,7 @@ class DocumentTypeFilenameListView(SingleObjectListView):
     object_permission = permission_document_type_view
 
     def get_document_type(self):
-        return get_object_or_404(DocumentType, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentType, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
diff --git a/mayan/apps/documents/views/document_version_views.py b/mayan/apps/documents/views/document_version_views.py
index 1d456bc68a..11da7a0244 100644
--- a/mayan/apps/documents/views/document_version_views.py
+++ b/mayan/apps/documents/views/document_version_views.py
@@ -38,7 +38,7 @@ class DocumentVersionListView(SingleObjectListView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -66,7 +66,7 @@ class DocumentVersionRevertView(ConfirmView):
         }
 
     def get_object(self):
-        return get_object_or_404(DocumentVersion, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentVersion, pk=self.kwargs['pk'])
 
     def view_action(self):
         try:
diff --git a/mayan/apps/documents/views/document_views.py b/mayan/apps/documents/views/document_views.py
index 79291a3e88..20fc6af025 100644
--- a/mayan/apps/documents/views/document_views.py
+++ b/mayan/apps/documents/views/document_views.py
@@ -111,7 +111,7 @@ class DeletedDocumentDeleteView(ConfirmView):
 
     def object_action(self, instance):
         source_document = get_object_or_404(
-            Document.passthrough, pk=instance.pk
+            klass=Document.passthrough, pk=instance.pk
         )
 
         AccessControlList.objects.check_access(
@@ -124,7 +124,9 @@ class DeletedDocumentDeleteView(ConfirmView):
         )
 
     def view_action(self):
-        instance = get_object_or_404(DeletedDocument, pk=self.kwargs['pk'])
+        instance = get_object_or_404(
+            klass=DeletedDocument, pk=self.kwargs['pk']
+        )
         self.object_action(instance=instance)
         messages.success(
             self.request, _('Document: %(document)s deleted.') % {
@@ -237,7 +239,7 @@ class DocumentDuplicatesListView(DocumentListView):
         ).dispatch(request, *args, **kwargs)
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         context = super(DocumentDuplicatesListView, self).get_extra_context()
@@ -326,7 +328,7 @@ class DocumentRestoreView(ConfirmView):
 
     def object_action(self, instance):
         source_document = get_object_or_404(
-            Document.passthrough, pk=instance.pk
+            klass=Document.passthrough, pk=instance.pk
         )
 
         AccessControlList.objects.check_access(
@@ -337,7 +339,9 @@ class DocumentRestoreView(ConfirmView):
         instance.restore()
 
     def view_action(self):
-        instance = get_object_or_404(DeletedDocument, pk=self.kwargs['pk'])
+        instance = get_object_or_404(
+            klass=DeletedDocument, pk=self.kwargs['pk']
+        )
 
         self.object_action(instance=instance)
 
@@ -365,7 +369,7 @@ class DocumentTrashView(ConfirmView):
         }
 
     def get_object(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_post_action_redirect(self):
         return reverse('documents:document_list_recent_access')
@@ -751,7 +755,7 @@ class DocumentTransformationsCloneView(FormView):
         return context
 
     def get_object(self):
-        instance = get_object_or_404(Document, pk=self.kwargs['pk'])
+        instance = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_transformation_edit,
@@ -824,7 +828,7 @@ class DocumentPrint(FormView):
         return context
 
     def get_object(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_template_names(self):
         if self.page_group or self.page_range:
diff --git a/mayan/apps/events/api_views.py b/mayan/apps/events/api_views.py
index c5513f0ff3..195a117832 100644
--- a/mayan/apps/events/api_views.py
+++ b/mayan/apps/events/api_views.py
@@ -27,7 +27,7 @@ class APIObjectEventListView(generics.ListAPIView):
 
     def get_object(self):
         content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
diff --git a/mayan/apps/events/views.py b/mayan/apps/events/views.py
index a596736ca3..27b86b50fe 100644
--- a/mayan/apps/events/views.py
+++ b/mayan/apps/events/views.py
@@ -156,7 +156,7 @@ class ObjectEventListView(EventListView):
 
     def dispatch(self, request, *args, **kwargs):
         self.object_content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
@@ -222,7 +222,7 @@ class ObjectEventTypeSubscriptionListView(FormView):
 
     def get_object(self):
         object_content_type = get_object_or_404(
-            ContentType, app_label=self.kwargs['app_label'],
+            klass=ContentType, app_label=self.kwargs['app_label'],
             model=self.kwargs['model']
         )
 
@@ -295,7 +295,7 @@ class UserEventListView(SingleObjectListView):
         return Action.objects.actor(obj=self.get_user())
 
     def get_user(self):
-        return get_object_or_404(get_user_model(), pk=self.kwargs['pk'])
+        return get_object_or_404(klass=get_user_model(), pk=self.kwargs['pk'])
 
 
 class VerbEventListView(SingleObjectListView):
diff --git a/mayan/apps/linking/api_views.py b/mayan/apps/linking/api_views.py
index be474e8865..5a6e0aaec0 100644
--- a/mayan/apps/linking/api_views.py
+++ b/mayan/apps/linking/api_views.py
@@ -32,7 +32,7 @@ class APIResolvedSmartLinkDocumentListView(generics.ListAPIView):
     serializer_class = ResolvedSmartLinkDocumentSerializer
 
     def get_document(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=self.request.user,
@@ -43,7 +43,7 @@ class APIResolvedSmartLinkDocumentListView(generics.ListAPIView):
 
     def get_smart_link(self):
         smart_link = get_object_or_404(
-            SmartLink.objects.get_for(document=self.get_document()),
+            klass=SmartLink.objects.get_for(document=self.get_document()),
             pk=self.kwargs['smart_link_pk']
         )
 
@@ -86,7 +86,7 @@ class APIResolvedSmartLinkView(generics.RetrieveAPIView):
     serializer_class = ResolvedSmartLinkSerializer
 
     def get_document(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=self.request.user,
@@ -123,7 +123,7 @@ class APIResolvedSmartLinkListView(generics.ListAPIView):
     serializer_class = ResolvedSmartLinkSerializer
 
     def get_document(self):
-        document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=self.request.user,
@@ -182,7 +182,7 @@ class APISmartLinkConditionListView(generics.ListCreateAPIView):
         else:
             permission_required = permission_smart_link_edit
 
-        smart_link = get_object_or_404(SmartLink, pk=self.kwargs['pk'])
+        smart_link = get_object_or_404(klass=SmartLink, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
@@ -225,7 +225,7 @@ class APISmartLinkConditionView(generics.RetrieveUpdateDestroyAPIView):
         else:
             permission_required = permission_smart_link_edit
 
-        smart_link = get_object_or_404(SmartLink, pk=self.kwargs['pk'])
+        smart_link = get_object_or_404(klass=SmartLink, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_required, user=self.request.user,
diff --git a/mayan/apps/linking/views.py b/mayan/apps/linking/views.py
index f7d99baa17..a07128d90a 100644
--- a/mayan/apps/linking/views.py
+++ b/mayan/apps/linking/views.py
@@ -33,10 +33,10 @@ logger = logging.getLogger(__name__)
 class ResolvedSmartLinkView(DocumentListView):
     def dispatch(self, request, *args, **kwargs):
         self.document = get_object_or_404(
-            Document, pk=self.kwargs['document_pk']
+            klass=Document, pk=self.kwargs['document_pk']
         )
         self.smart_link = get_object_or_404(
-            SmartLink, pk=self.kwargs['smart_link_pk']
+            klass=SmartLink, pk=self.kwargs['smart_link_pk']
         )
 
         AccessControlList.objects.check_access(
@@ -114,7 +114,7 @@ class SetupSmartLinkDocumentTypesView(AssignRemoveView):
         }
 
     def get_object(self):
-        return get_object_or_404(SmartLink, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=SmartLink, pk=self.kwargs['pk'])
 
     def left_list(self):
         # TODO: filter document type list by user ACL
@@ -166,7 +166,7 @@ class SmartLinkListView(SingleObjectListView):
 
 class DocumentSmartLinkListView(SmartLinkListView):
     def dispatch(self, request, *args, **kwargs):
-        self.document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        self.document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=request.user,
@@ -262,7 +262,7 @@ class SmartLinkConditionListView(SingleObjectListView):
         return self.get_smart_link().conditions.all()
 
     def get_smart_link(self):
-        return get_object_or_404(SmartLink, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=SmartLink, pk=self.kwargs['pk'])
 
 
 class SmartLinkConditionCreateView(SingleObjectCreateView):
@@ -300,7 +300,7 @@ class SmartLinkConditionCreateView(SingleObjectCreateView):
         return self.get_smart_link().conditions.all()
 
     def get_smart_link(self):
-        return get_object_or_404(SmartLink, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=SmartLink, pk=self.kwargs['pk'])
 
 
 class SmartLinkConditionEditView(SingleObjectEditView):
diff --git a/mayan/apps/mailer/views.py b/mayan/apps/mailer/views.py
index cedd240eae..aac1b7b66c 100644
--- a/mayan/apps/mailer/views.py
+++ b/mayan/apps/mailer/views.py
@@ -211,7 +211,7 @@ class UserMailerLogEntryListView(SingleObjectListView):
         return self.get_user_mailer().error_log.all()
 
     def get_user_mailer(self):
-        return get_object_or_404(UserMailer, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=UserMailer, pk=self.kwargs['pk'])
 
 
 class UserMailerListView(SingleObjectListView):
@@ -255,7 +255,7 @@ class UserMailerTestView(FormView):
         }
 
     def get_object(self):
-        user_mailer = get_object_or_404(UserMailer, pk=self.kwargs['pk'])
+        user_mailer = get_object_or_404(klass=UserMailer, pk=self.kwargs['pk'])
         AccessControlList.objects.check_access(
             permissions=permission_user_mailer_use, user=self.request.user,
             obj=user_mailer
diff --git a/mayan/apps/metadata/api.py b/mayan/apps/metadata/api.py
index 3848d0822d..9becfc1913 100644
--- a/mayan/apps/metadata/api.py
+++ b/mayan/apps/metadata/api.py
@@ -54,8 +54,7 @@ def save_metadata(metadata_dict, document, create=False, _user=None):
     parameters = {
         'document': document,
         'metadata_type': get_object_or_404(
-            MetadataType,
-            pk=metadata_dict['id']
+            klass=MetadataType, pk=metadata_dict['id']
         )
     }
 
@@ -71,8 +70,7 @@ def save_metadata(metadata_dict, document, create=False, _user=None):
             document_metadata = DocumentMetadata.objects.get(
                 document=document,
                 metadata_type=get_object_or_404(
-                    MetadataType,
-                    pk=metadata_dict['id']
+                    klass=MetadataType, pk=metadata_dict['id']
                 ),
             )
         except DocumentMetadata.DoesNotExist:
diff --git a/mayan/apps/metadata/api_views.py b/mayan/apps/metadata/api_views.py
index ae9a2ab114..879dab4f33 100644
--- a/mayan/apps/metadata/api_views.py
+++ b/mayan/apps/metadata/api_views.py
@@ -39,7 +39,7 @@ class APIDocumentMetadataListView(generics.ListCreateAPIView):
             permission_required = permission_metadata_document_add
 
         document = get_object_or_404(
-            Document, pk=self.kwargs['document_pk']
+            klass=Document, pk=self.kwargs['document_pk']
         )
 
         AccessControlList.objects.check_access(
@@ -99,7 +99,7 @@ class APIDocumentMetadataView(generics.RetrieveUpdateDestroyAPIView):
             permission_required = permission_metadata_document_remove
 
         document = get_object_or_404(
-            Document, pk=self.kwargs['document_pk']
+            klass=Document, pk=self.kwargs['document_pk']
         )
 
         AccessControlList.objects.check_access(
@@ -171,7 +171,7 @@ class APIDocumentTypeMetadataTypeListView(generics.ListCreateAPIView):
             permission_required = permission_document_type_edit
 
         document_type = get_object_or_404(
-            DocumentType, pk=self.kwargs['document_type_pk']
+            klass=DocumentType, pk=self.kwargs['document_type_pk']
         )
 
         AccessControlList.objects.check_access(
@@ -228,7 +228,7 @@ class APIDocumentTypeMetadataTypeView(generics.RetrieveUpdateDestroyAPIView):
             permission_required = permission_document_type_edit
 
         document_type = get_object_or_404(
-            DocumentType, pk=self.kwargs['document_type_pk']
+            klass=DocumentType, pk=self.kwargs['document_type_pk']
         )
 
         AccessControlList.objects.check_access(
diff --git a/mayan/apps/metadata/views.py b/mayan/apps/metadata/views.py
index a110dc7bdc..e74db2a23b 100644
--- a/mayan/apps/metadata/views.py
+++ b/mayan/apps/metadata/views.py
@@ -397,7 +397,7 @@ class DocumentMetadataListView(SingleObjectListView):
         )
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         document = self.get_document()
@@ -539,7 +539,7 @@ class DocumentMetadataRemoveView(MultipleObjectFormActionView):
         for form in form.forms:
             if form.cleaned_data['update']:
                 metadata_type = get_object_or_404(
-                    MetadataType, pk=form.cleaned_data['id']
+                    klass=MetadataType, pk=form.cleaned_data['id']
                 )
                 try:
                     document_metadata = DocumentMetadata.objects.get(
@@ -705,7 +705,7 @@ class SetupDocumentTypeMetadataTypes(FormView):
         return initial
 
     def get_object(self):
-        obj = get_object_or_404(self.model, pk=self.kwargs['pk'])
+        obj = get_object_or_404(klass=self.model, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=(permission_metadata_type_edit,),
diff --git a/mayan/apps/ocr/api_views.py b/mayan/apps/ocr/api_views.py
index fe6d17e8db..0dea74beb3 100644
--- a/mayan/apps/ocr/api_views.py
+++ b/mayan/apps/ocr/api_views.py
@@ -46,7 +46,7 @@ class APIDocumentVersionOCRView(generics.GenericAPIView):
     queryset = DocumentVersion.objects.all()
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['document_pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['document_pk'])
 
     def get_queryset(self):
         return self.get_document().versions.all()
@@ -74,11 +74,12 @@ class APIDocumentPageOCRContentView(generics.RetrieveAPIView):
     serializer_class = DocumentPageOCRContentSerializer
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['document_pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['document_pk'])
 
     def get_document_version(self):
         return get_object_or_404(
-            self.get_document().versions.all(), pk=self.kwargs['version_pk']
+            klass=self.get_document().versions.all(),
+            pk=self.kwargs['version_pk']
         )
 
     def get_queryset(self):
diff --git a/mayan/apps/ocr/views.py b/mayan/apps/ocr/views.py
index e6e3949d00..6d8f5d6aff 100644
--- a/mayan/apps/ocr/views.py
+++ b/mayan/apps/ocr/views.py
@@ -124,7 +124,7 @@ class DocumentTypeSettingsEditView(SingleObjectEditView):
     post_action_redirect = reverse_lazy('documents:document_type_list')
 
     def get_document_type(self):
-        return get_object_or_404(DocumentType, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=DocumentType, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
@@ -153,7 +153,7 @@ class DocumentOCRErrorsListView(SingleObjectListView):
     object_permission = permission_ocr_document
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
     def get_extra_context(self):
         return {
diff --git a/mayan/apps/permissions/views.py b/mayan/apps/permissions/views.py
index fc6b9c3b70..ca5fefad39 100644
--- a/mayan/apps/permissions/views.py
+++ b/mayan/apps/permissions/views.py
@@ -34,7 +34,7 @@ class GroupRoleMembersView(AssignRemoveView):
     object_permission = permission_group_edit
 
     def add(self, item):
-        role = get_object_or_404(Role, pk=item)
+        role = get_object_or_404(klass=Role, pk=item)
         self.get_object().roles.add(role)
 
     def get_extra_context(self):
@@ -44,7 +44,7 @@ class GroupRoleMembersView(AssignRemoveView):
         }
 
     def get_object(self):
-        return get_object_or_404(Group, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Group, pk=self.kwargs['pk'])
 
     def left_list(self):
         return [
@@ -57,7 +57,7 @@ class GroupRoleMembersView(AssignRemoveView):
         ]
 
     def remove(self, item):
-        role = get_object_or_404(Role, pk=item)
+        role = get_object_or_404(klass=Role, pk=item)
         self.get_object().roles.remove(role)
 
 
@@ -87,7 +87,7 @@ class SetupRoleMembersView(AssignRemoveView):
     object_permission = permission_role_edit
 
     def add(self, item):
-        group = get_object_or_404(Group, pk=item)
+        group = get_object_or_404(klass=Group, pk=item)
         self.get_object().groups.add(group)
 
     def get_extra_context(self):
@@ -101,7 +101,7 @@ class SetupRoleMembersView(AssignRemoveView):
         }
 
     def get_object(self):
-        return get_object_or_404(Role, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Role, pk=self.kwargs['pk'])
 
     def left_list(self):
         return [
@@ -114,7 +114,7 @@ class SetupRoleMembersView(AssignRemoveView):
         ]
 
     def remove(self, item):
-        group = get_object_or_404(Group, pk=item)
+        group = get_object_or_404(klass=Group, pk=item)
         self.get_object().groups.remove(group)
 
 
@@ -148,7 +148,7 @@ class SetupRolePermissionsView(AssignRemoveView):
         Permission.check_permissions(
             self.request.user, permissions=(permission_permission_grant,)
         )
-        permission = get_object_or_404(StoredPermission, pk=item)
+        permission = get_object_or_404(klass=StoredPermission, pk=item)
         self.get_object().permissions.add(permission)
 
     def dispatch(self, request, *args, **kwargs):
@@ -169,7 +169,7 @@ class SetupRolePermissionsView(AssignRemoveView):
         }
 
     def get_object(self):
-        return get_object_or_404(Role, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Role, pk=self.kwargs['pk'])
 
     def left_list(self):
         Permission.refresh()
@@ -189,7 +189,7 @@ class SetupRolePermissionsView(AssignRemoveView):
         Permission.check_permissions(
             self.request.user, permissions=(permission_permission_revoke,)
         )
-        permission = get_object_or_404(StoredPermission, pk=item)
+        permission = get_object_or_404(klass=StoredPermission, pk=item)
         self.get_object().permissions.remove(permission)
 
 
diff --git a/mayan/apps/sources/api_views.py b/mayan/apps/sources/api_views.py
index e55530230d..f4f422ea39 100644
--- a/mayan/apps/sources/api_views.py
+++ b/mayan/apps/sources/api_views.py
@@ -21,7 +21,7 @@ class APIStagingSourceFileView(generics.GenericAPIView):
 
     def get(self, request, staging_folder_pk, encoded_filename):
         staging_folder = get_object_or_404(
-            StagingFolderSource, pk=staging_folder_pk
+            klass=StagingFolderSource, pk=staging_folder_pk
         )
         return Response(
             StagingFolderFileSerializer(
diff --git a/mayan/apps/sources/views.py b/mayan/apps/sources/views.py
index 844a55d6dc..3b9a3bb47a 100644
--- a/mayan/apps/sources/views.py
+++ b/mayan/apps/sources/views.py
@@ -76,7 +76,7 @@ class SourceLogListView(SingleObjectListView):
 
     def get_source(self):
         return get_object_or_404(
-            Source.objects.select_subclasses(), pk=self.kwargs['pk']
+            klass=Source.objects.select_subclasses(), pk=self.kwargs['pk']
         )
 
 
@@ -112,7 +112,7 @@ class UploadBaseView(MultiFormView):
     def dispatch(self, request, *args, **kwargs):
         if 'source_id' in kwargs:
             self.source = get_object_or_404(
-                Source.objects.filter(enabled=True).select_subclasses(),
+                klass=Source.objects.filter(enabled=True).select_subclasses(),
                 pk=kwargs['source_id']
             )
         else:
@@ -198,7 +198,7 @@ class UploadInteractiveView(UploadBaseView):
         self.subtemplates_list = []
 
         self.document_type = get_object_or_404(
-            DocumentType,
+            klass=DocumentType,
             pk=self.request.GET.get(
                 'document_type_id', self.request.POST.get('document_type_id')
             )
@@ -369,7 +369,9 @@ class UploadInteractiveVersionView(UploadBaseView):
 
         self.subtemplates_list = []
 
-        self.document = get_object_or_404(Document, pk=kwargs['document_pk'])
+        self.document = get_object_or_404(
+            klass=Document, pk=kwargs['document_pk']
+        )
 
         # TODO: Try to remove this new version block check from here
         if NewVersionBlock.objects.is_blocked(self.document):
@@ -492,7 +494,7 @@ class StagingFileDeleteView(SingleObjectDeleteView):
 
     def get_source(self):
         return get_object_or_404(
-            StagingFolderSource, pk=self.kwargs['pk']
+            klass=StagingFolderSource, pk=self.kwargs['pk']
         )
 
 
@@ -519,7 +521,9 @@ class SetupSourceCheckView(ConfirmView):
         }
 
     def get_object(self):
-        return get_object_or_404(Source.objects.select_subclasses(), pk=self.kwargs['pk'])
+        return get_object_or_404(
+            klass=Source.objects.select_subclasses(), pk=self.kwargs['pk']
+        )
 
     def view_action(self):
         task_check_interval_source.apply_async(
@@ -553,7 +557,7 @@ class SetupSourceDeleteView(SingleObjectDeleteView):
 
     def get_object(self):
         return get_object_or_404(
-            Source.objects.select_subclasses(), pk=self.kwargs['pk']
+            klass=Source.objects.select_subclasses(), pk=self.kwargs['pk']
         )
 
     def get_form_class(self):
@@ -572,7 +576,7 @@ class SetupSourceEditView(SingleObjectEditView):
 
     def get_object(self):
         return get_object_or_404(
-            Source.objects.select_subclasses(), pk=self.kwargs['pk']
+            klass=Source.objects.select_subclasses(), pk=self.kwargs['pk']
         )
 
     def get_form_class(self):
diff --git a/mayan/apps/tags/api_views.py b/mayan/apps/tags/api_views.py
index d62a6e50c2..86d0daba2e 100644
--- a/mayan/apps/tags/api_views.py
+++ b/mayan/apps/tags/api_views.py
@@ -86,7 +86,7 @@ class APITagDocumentListView(generics.ListAPIView):
     serializer_class = DocumentSerializer
 
     def get_queryset(self):
-        tag = get_object_or_404(Tag, pk=self.kwargs['pk'])
+        tag = get_object_or_404(klass=Tag, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_tag_view, user=self.request.user, obj=tag
@@ -107,7 +107,7 @@ class APIDocumentTagListView(generics.ListCreateAPIView):
     }
 
     def get_document(self):
-        return get_object_or_404(Document, pk=self.kwargs['document_pk'])
+        return get_object_or_404(klass=Document, pk=self.kwargs['document_pk'])
 
     def get_queryset(self):
         document = self.get_document()
@@ -162,7 +162,7 @@ class APIDocumentTagView(generics.RetrieveDestroyAPIView):
     serializer_class = DocumentTagSerializer
 
     def get_document(self):
-        document = get_object_or_404(Document, pk=self.kwargs['document_pk'])
+        document = get_object_or_404(klass=Document, pk=self.kwargs['document_pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=self.request.user,
diff --git a/mayan/apps/tags/views.py b/mayan/apps/tags/views.py
index b14d47ab4a..1f740d4a13 100644
--- a/mayan/apps/tags/views.py
+++ b/mayan/apps/tags/views.py
@@ -221,7 +221,7 @@ class TagListView(SingleObjectListView):
 
 class TagTaggedItemListView(DocumentListView):
     def get_tag(self):
-        return get_object_or_404(Tag, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Tag, pk=self.kwargs['pk'])
 
     def get_document_queryset(self):
         return self.get_tag().documents.all()
@@ -240,7 +240,7 @@ class TagTaggedItemListView(DocumentListView):
 
 class DocumentTagListView(TagListView):
     def dispatch(self, request, *args, **kwargs):
-        self.document = get_object_or_404(Document, pk=self.kwargs['pk'])
+        self.document = get_object_or_404(klass=Document, pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=permission_document_view, user=request.user,
diff --git a/mayan/apps/user_management/api_views.py b/mayan/apps/user_management/api_views.py
index 3d725dec67..2d914424db 100644
--- a/mayan/apps/user_management/api_views.py
+++ b/mayan/apps/user_management/api_views.py
@@ -146,7 +146,7 @@ class APIUserGroupList(generics.ListCreateAPIView):
         else:
             permission = permission_user_edit
 
-        user = get_object_or_404(get_user_model(), pk=self.kwargs['pk'])
+        user = get_object_or_404(klass=get_user_model(), pk=self.kwargs['pk'])
 
         AccessControlList.objects.check_access(
             permissions=(permission,), user=self.request.user,
diff --git a/mayan/apps/user_management/views.py b/mayan/apps/user_management/views.py
index 5f74b1d1fb..f945bc738a 100644
--- a/mayan/apps/user_management/views.py
+++ b/mayan/apps/user_management/views.py
@@ -112,7 +112,7 @@ class GroupMembersView(AssignRemoveView):
         }
 
     def get_object(self):
-        return get_object_or_404(Group, pk=self.kwargs['pk'])
+        return get_object_or_404(klass=Group, pk=self.kwargs['pk'])
 
     def left_list(self):
         return GroupMembersView.generate_choices(
@@ -237,7 +237,7 @@ class UserGroupsView(AssignRemoveView):
 
     def get_object(self):
         return get_object_or_404(
-            get_user_model().objects.filter(
+            klass=get_user_model().objects.filter(
                 is_superuser=False, is_staff=False
             ), pk=self.kwargs['pk']
         )
@@ -299,7 +299,7 @@ class UserOptionsEditView(SingleObjectEditView):
 
     def get_user(self):
         return get_object_or_404(
-            get_user_model().objects.filter(
+            klass=get_user_model().objects.filter(
                 is_superuser=False, is_staff=False
             ), pk=self.kwargs['pk']
         )